package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceimpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    @Transactional   //事务要么全部成功要么全部失败     多表
    @Override
    public void saveWithFlavor(DishDTO dishDto) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDto, dish);
        //向菜品表插入1条数据
        dishMapper.insert(dish);

        //获取inser语句中的主键值
        Long dishId = dish.getId();

        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDto.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });

            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    @Transactional
    public void deleBatch(List<Long> ids) {
        //判断菜品是否正在进行起售

        for (Long id : ids) {
            Dish dish = dishFlavorMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //启用中
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }    //是否被套餐所关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的数据
//        for (Long id : ids) {
        dishFlavorMapper.deleteById(ids);
        //删除菜品表中的数据
        dishMapper.deleteByDishId(ids);
//        }

    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        //将查询到的数据封装到vo
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //修改菜品表
        dishMapper.update(dish);
        //口味删除后插入
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });

            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Transactional
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
        if (status == StatusConstant.DISABLE) {
            //如果是停售状态还要将该菜品当前套餐也停止
            ArrayList<Long> dishId = new ArrayList<>();
            dishId.add(id);
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(dishId);
            if (setmealIds != null && setmealIds.size() > 0) {
                for (Long setmealId : setmealIds) {
                    Setmeal setmeal = Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                    SetmealMapper.update(setmeal);
                }

            }
        }
    }

    @Override
    public List<Dish> list(Long categoryId) {

        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);


    }
/*
*
* user端查询菜表
* */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> list = dishMapper.list(dish);
        ArrayList<DishVO> dishVOSList = new ArrayList<>();
        for (Dish d : list){
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //查询id菜品表对应的口味
            List<DishFlavor> byDishId = dishFlavorMapper.getByDishId(d.getId());
            dishVO.setFlavors(byDishId);
            dishVOSList.add(dishVO);
        }
       return dishVOSList;
    }
}
